FBP Go: Coordinates - provide user feedback on location button. (e.g. fetching and failed state).

**As a** *(User Type/Persona)* **I want** *(Feature/enhancement)* **So That** *(Value, why is this wanted, what is the user trying to accomplish)*

**Additional Context**
- No feedback loop when clicking on location button. Ideally state should be communicated to user.
- enter text here

**Acceptance Criteria**
- [ ] Given (Context), When (action carried out), Then (expected outcome)
- [ ] Given (Context), When (action carried out), Then (expected outcome)

**Definition of Done**
- [ ] Ready to Demo in Sprint Review
- [ ] Does what I have made have appropriate test coverage?
- [ ] Documentation and/or scientific documentation exists and can be found
- [ ] Peer Reviewed by 2 people on the team
- [ ] Manual testing of all PRs in Dev and Prod
- [ ] Merged

Start by locating the FBP Go coordinates location button in the frontend and tracing its click flow. Clarify the fetching and failed states, then add user-visible feedback and define tests or manual checks that demonstrate both states.

Written by the indexing model from the issue text.